Front end loaders



May 21, 1963 G R. DEMPsTER ETAL 3,090,512

FRONT END LOADERS 5 Sheets-Sheet 1 Filed Aug. 7, 1958 ,JWM :www

May 21, 1963 G. R. DEMPSTER ETAL 3,090,512

FRONT END LOADERS 3 Sheets-Sheet 2 Filed Aug. 7, 1958 W y M M M n BY a i ATTORNEY May v21, 1963 G. R. DEMPSTER ETAL 3,090,512

FRONT END LOADERS 3 Sheets-Sheet 3 Filed Aug. '7, 1958 INVENTORS BY fm@ ATTORNEYS United States Patent O 3,090,512 FRONT END LOADERS George R. Dempster and Willi m A. Herpich, Knoxville, Herpich assignor to Dempster Brothers, Inc., Knoxville, Tenn., a corporation of Tennessee Filed Aug. 7, 1958, Ser. No. 753,696 8 Claims. (Cl. 214-302) invention relates to improvements in front end This aders of the character Various attempts have been made heretofore to limit or control the raised These objects may be accomplished, according to one embodiment of the invention,

container has dumping position. Such -suping movement of the lifting arms when the been raised to the proper port boxes -and adding same time, they protect the container and body against 3,9951? Patented May 2l, 1963 made heretofore for absorbing the shock resulting therefrom.

of the front end of the character generally indicated by the numeral 1 and which is self-propelled under control of an operator on road mounted wheels indicated generally at 2 and 3. The

front portion of the truck, substantially as illustrated in FIG. 1. The arms `should clear the cab fully, but the dimensions kep-t as reasonably close as practicable to the sides and top and yet lightness in weight, as desired.

The arms 8 extend downward at the back of the cab 4, with their lower ends -iixed on ia torque tube 9 extending transversely of the vehicle Iand suitably journaled on ythe chassis frame l. Hydraulic power devices, generally ind-ioated at lll, are operatively connected with the arms 8 vehicle for swinging movements about a substantially horizontal axis located rearwardly of said cab, and each arm having a separate end portion rigid with the rstthe combination with a motor vehicle, of a loader unit operatively mounted on the vehicle and including a pair ot' lifting arms movable between a lowered position tend over the vehicle, a torque tube extending transversely between the lifting arms, means mounted on the torque tube adjacent the lifting arms for detachable engagement with the container for lifting the container In a front end loader of the character described, the combination of loading mechanism comprising a pair of the length of the torque tube.

In a front end loader of the character described,

holding the container in spaced bearing relation with respect to the torque tube.

8. In a fro being invert nt end loader of the character described, 'on with a motor vehicle of the type having References Cited in the ile of this patent UNITED STATES PATENTS Troutman Ian. 18, 1949 Brisson et al. lune 23, 1953 Isaksen May 25, 1954 Harbers Feb. 25, 1958 Beasley et al. Feb. 25, `1958 Dempster et al. Aug. 18, 1959 

2. IN A FRONT END LOADER OF THE CHARACTER DESCRIBED, THE COMBINATION WITH A MOTOR VEHICLE OF THE TYPE HAVING A A BODY ADAPTED TO RECEIVE MATERIAL THEREDIN AND HAVING IN FRONT OF THE BODY AN OPERATOR''S CAB WITH WHEELS ON OPPOSITE SIDES THEREOF NEAR THE FRONT END THEREOF, OF A LOADING MECHANISM COMPRISING A PAIR OF RIGID LIFTING ARMS EACH HAVING A RIGID END PORTION PIVOTALLY MOUNTED ON SAID VEHICLE FOR SWINGING MOVEMENTS ABOUT A SUBSTANTIALLY HORIZONTAL AXIS LOCATED REARWARDLY OF SAID CAB, AND EACH ARM HAVING A SEPARATE END PORTION RIGID WITH THE FIRSTMENTIONED END PORTION AND SPACED FROM SAID PIVOTAL MOUNTING ON THE VEHICLE, MEANS FOR SWINGING SAID LIFTING ARMS ABOUT SAID AXIS BETWEEN A LOWERED POSITION IN WHICH SAID LAST-MENTIONED END PORTION OF SAID ARMS EXTEND FORWARDLY TO A LOCATION BELOW THE TOPS OF SAID WHEELS AND IN FRONT OF SAID CAB AND A RAISED POSITION IN WHICH SAID LAST-MENTIONED END PORTIONS OF SAID ARMS EXTEND UPWARDLY TO A LOCATION NEAR THE TOP OF SAID BODY, EACH OF SAID ARMS BEING OF A RIGID ANGULAR CONFIGURATION SUCH THAT, IN ITS LOWERED POSITION, IT EXTENDS OVER THE TOP OF THE ADJACENT WHEEL AND ITS FRONT END PORTION EXTENDS DOWNWARDLY TO SAID LOCATION BELOW THE TOP OF THE WHEEL AND IN FRONT OF THE CAB, MEANS ON THE FRONT PORTIONS OF SAID ARMS FOR DETACHABLE ENGAGEMENT WITH A CONTAINER TO LIFT THE CONTAINER UPON SWINGING MOVEMENT OF THE ARMS AND DUMP THE CONTENTS THEREFROM INTO SAID BODY, AND RIGID MEANS ON THE FRONT END PORTIONS OF THE ARMS FOR TRANSMITTING THE IMPACT OF ENGAGEMENT WITH THE CONTAINER TO THE MOTOR VEHICLE.
 7. IN A FRONT END LOADER OF THE CHARACTER DESCRIBED, THE COMBINATION OF LOADING MECHANISM COMPRISING A PAIR OF LIFTING ARMS MOVABLE BETWEEN A LOWERED POSITION WHEREIN THE LIFTING ARMS EXTEND TO THE FRONT OF THE VEHICLE AND A RAISED POSITION WHEREIN THE LIFTING ARMS EXTEND OVER THE VEHICLE, MOUNTING MEANS FOR THE LIFTING ARMS AT ONE END THEREOF, A TORQUE TUBE CONNECTING THE ARMS TOGETHER AT THE OPPOSITE END THEREOF, MEANS FOR TURNING THE TORQUE TUBE RELATIVE TO THE ARMS, A CONTAINER, MEANS SUPPORTED BY THE TORQUE TUBE AND MOVABLE THEREWITH FOR HOLDING THE CONTAINER IN SPACED BEARING RELATION WITH RESPECT TO THE TORQUE TUBE.
 8. IN A FRONT END LOADER OF THE CHARACTER DESCRIBED, THE COMBINATION WITH A MOTOR VEHICLE OF THE TYPE HAVING A BODY PROVIDED WITH AN OPENING IN THE TOP THEREOF ADAPTED TO RECEIVE MATERIAL THEREIN, OF A PAIR OF LIFTING ARMS PIVOTALLY MOUNTED ON THE VEHICLE FOR SWINGING MOVEMENT BETWEEN A LOWERED POSITION WHEREIN THE FREE ENDS OF THE LIFTING ARMS EXTEND TO THE FRONT OF THE VEHICLE AND A RAISED POSITION WHEREIN THE FREE ENDS OF THE LIFTING ARMS EXTEND OVER THE BODY; POWER MEANS FOR SWINGING THE LIFTING ARMS IN PATHS OF MOVEMENT TO SAID LOWERED AND RAISED POSITIONS; MEANS ON THE FREE ENDS OF THE LIFTING ARMS FOR DETACHABLY ENGAGING A SEPARABLE CONTAINER WHEN THE LIFTING ARMS ARE IN A LOWERED POSITIOIN AND COOPERATING TO LIFT A SEPARABLE CONTAINER IN A GENERALLY UPRIGHT POSITION TO AN ELEVATED LOCATION ABOVE THE BODY AND TO INVERT THE CONTAINER TO DUMP THE CONTENTS THEREOF INTO THE BODY; A BRACKET MEMBER MOUNTED ON AND MOIVABLE WITH EACH LIFTING ARM AND INCLUDING A BEARING SURFACE PROJECTING INWARDLY FROM THE LIFTING ARM, AND SUPPORT MEMBERS ON THE BODY AT OPPOSITE EDGES OF THE TOP OPENING AND SPACED INWARDLY FROM THE PATHS OF MOVEMENT OF THE ARMS, SAID BRACKET MEMBERS AND SUPPORT MEMBERS BEING IN POSITION TO BE ALIGNED IN ABUTTING RELATION WHEN THE LIFTING ARMS ARE IN THE RAISED POSITIION TO SUPPORT THE WEIGHT OF THE SEPARABLE CONTAINER AND TO STABILIZE THE FREE ENDS OF THE LIFTING ARMS DURING THE TIME THAT THE CONTAINER IS BEING INVERTED. 